Your rabbits are displaying this behavior because they are frusterated. Testosterone in any animal greatly increases the tendancy to show dominance, aggression, territoral behaviors, and mating instincts.
you MUST take them to a rabbit-experianced veterinarian and have them nutered in order to stop the mating behaviors. Rabbits are very social, very intelligent animals who need to be challanged, so after you have them nutered, make sure you provide mentally stimulating activities such as cardboard tubes and boxes to run through, rabbit-safe toys to flip and toss (plastic drinking cups and toilet tubes work well), balls to roll, towels to dig (if housed indoors)...
Please help your wife to understand that religous codes of ethics do not apply to animals- they are very simply driven by nature. They do simply what God put them on the earth to do. When we accept creatures into our lives as pets (dogs, cats, rabbits, horses, etc...) we are removing them from their natural habbitat and family groups and confining them in artifical areas, and often in a 'family' consisting of many different species.
This is where the real adventure of pet ownership begins... we love them as our furry children and often times place the powers of human reasoning and thought upon them, but we must remember who they really are and what they need... they are rabbits, they need companionship, mental stimulation, they are driven to eat, to sleep, to mate... There is no right or wrong in the animal kingdom, they just 'do'.
To truly fufill the rabbits you love, help releave the frusteration they are telling you is overpowering their minds... have them nutered. I promise you will see less dominace, marking behaviors, sexual frusteration (from lack of a female), and they will thank you for it many times over.
-Registered Veterinary Technicion
(and rabbit owner)